PHYSICAL EVIDENCE MANUAL - Crime Scene Investigator Network

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Physical Evidence Manual Field Test Kits When using commercially purchased field test kits, remember a positive result with the kit only indicates the possible presence of a drug. There can be other substances that give the same reaction. Generally, the colors of a positive reaction indicated on the test kit are very apparent and interpretation of the result is usually not necessary. The field test kits should be discarded after use. Many of the kits contain concentrated acids that can leak, creating a chemical hazard. In addition, drugs tested in these kits cannot be further analyzed and therefore should not be submitted to the laboratory. Officers using field test kits should not do so on a residue amount of drug. In cases where quantities are limited, omit the field test and submit the evidence directly to the laboratory for analysis. Clandestine Drug Laboratories Clandestine drug laboratories range from crude makeshift operations to sophisticated and technologically complex facilities. They can be set up anywhere and are often found in private residences, hotel and motel rooms, trailers, barns and outbuildings, and commercial buildings. At these locations sophisticated surveillance equipment and booby-traps may be set up to deter intruders and law enforcement personnel from entering. Extreme care and caution should be exercised whenever investigating or processing a clandestine drug lab site. The chemicals and substances used in the manufacturing process can be caustic, explosive, carcinogenic, poisonous, irritating, and flammable. Laboratory and law enforcement personnel participating in clandestine drug laboratory investigations should have specialized training in the use of protective equipment and the appropriate health and safety procedures. The processing of clandestine drug laboratories also involves the sampling, removal, and proper disposal of hazardous toxic chemicals. The transportation and disposal of these chemicals is regulated by state and federal environmental protection agencies. There are usually two situations when a clandestine laboratory is encountered. The first is when police or fire agency personnel encounter a previously unknown lab. When this occurs the personnel should secure the scene, allow no unauthorized or unnecessary entry, and contact the local specialized unit or trained personnel to process clandestine laboratories. Adopted: May 2002 Revisions: 6 Last Revision: January 31, 2008 7-3
Physical Evidence Manual When clandestine drug laboratory chemicals are detected during a vehicle stop, treat the site as a crime scene. Contact the local law enforcement unit trained to handle this situation for assistance. The second situation would involve prior knowledge by the local law enforcement agency of the illegal activity. A raid is planned and personnel needed for the proper shut down and dismantling of the laboratory have been contacted. Adopted: May 2002 Revisions: 6 Last Revision: January 31, 2008 7-4
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PHYSICAL EVIDENCE MANUAL - Crime Scene Investigator Network

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